Senior AI Engineer (MS Copilot)

Expleo is seeking a Senior AI Engineer to join their client’s team and design production-ready AI systems that leverage Microsoft Copilot. The role involves blending platform-native capabilities with custom engineering to deliver secure and scalable AI solutions that integrate with enterprise data sources.

Responsibilities:

• Design and implement solutions using Microsoft Copilot Studio, Microsoft 365 Copilot, and Azure OpenAI
• Extend Copilot capabilities through custom engineering, including backend APIs and retrieval systems
• Build and maintain LLM-powered services that support Copilot extensions and standalone enterprise use cases
• Design and implement retrieval-augmented generation (RAG) pipelines, including:
• Document ingestion and normalization
• Chunking, metadata, and embedding strategies
• Indexing using vector and hybrid search approaches
• Implement hybrid retrieval strategies (keyword + vector + reranking) for grounded AI outputs
• Integrate AI solutions with enterprise systems such as SharePoint, Microsoft Graph, SQL, and internal APIs
• Design systems with clear attention to:
• Security and data access boundaries
• Reliability and failure handling
• Performance, latency, and cost efficiency in Azure
• Establish evaluation, monitoring, and quality metrics for Copilot and LLM-based systems
• Collaborate with client stakeholders to translate business needs into Copilot-first, extensible AI solutions

Requirements:

• 5+ years of experience in software engineering, AI/ML systems, or enterprise platforms
• Hands-on experience within the Microsoft Copilot ecosystem
• Practical experience with Azure OpenAI Service
• Strong Python skills and experience building production APIs (FastAPI, Flask, or similar)
• Experience designing and implementing RAG-based systems
• Solid understanding of prompt design, context management, and grounding techniques
• Experience integrating AI solutions with enterprise data sources
• Comfort working in secure, governed enterprise environments
• Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent practical experience)
• Production experience with Azure AI Search (Cognitive Search)
• Experience designing Copilot extensions backed by custom RAG systems
• Familiarity with orchestration frameworks such as LangChain or LlamaIndex (used pragmatically)
• Experience implementing reranking and relevance tuning
• Experience with LLM evaluation frameworks (groundedness, accuracy, reliability)
• Prior consulting or enterprise client experience
• Familiarity with Azure AI Foundry or similar tooling
• Microsoft or Azure certifications are preferred but not required